Capacity Analysis Of Full-duplex Wireless Networks

In recent years,due to the rapid growth of wireless network users,resulting in the wireless network of increasingly scarce resources,can not meet the growing needs of wireless network users.Therefore,in the case of limited spectrum resources,how to further improve the wireless network spectrum efficiency,and further optimize the network capacity and other issues more and more challenging.Full-duplex technology can simultaneously receive and send wireless network signals,theoretically can be doubled to increase network capacity.So full-duplex technology for wireless network researchers is a great attraction.Although theoretically full-duplex technology can double the half-duplex technology to increase the network capacity,but in the actual operation,due to the existence of self-interference,full-duplex technology capacity gain is often less than the theoretical double gain,Even when the self-interference is too strong,resulting in full-duplex node decoding efficiency,its capacity is even lower than the half-duplex wireless network capacity.Many studies of self-interference cancellation techniques have eliminated the self-interference to a large extent,but still can not be completely eliminated.The residual self-interference caused by incomplete self-interference cancellation often affects full-duplex capacity gain,so that researchers can not accurately understand the full-duplex wireless network capacity problems,and even many researchers in the assumption that self-interference can be completely eliminated under the conditions of the full-duplex wireless network capacity,is clearly not realistic.In this paper,unlike previous studies,we improved the successful transmission probability model used in the past and calculated the successful transmission probability of full-duplex wireless networks using the SIR model.Our research shows that there are still other links that achieve unidirectional success in some links,and that these unidirectional successful links are often overlooked in the past the covery of these unsuccessful unidirectional successful links improves the successful transmission probability and network capacity of the full-duplex wireless network,which truly reflects the capacity gain of the full-duplex wireless network.In the third chapter,we use the Poisson process to simulate the wireless network.And the randomness of the distribution of nodes in the wireless ad hoc network can easily lead to the characteristics of the interrupt,and the use of full-duplex technology will increase the number of interference nodes,increase the interference of the wireless network,and its own self-interference problems will increase In this paper,we apply the full-duplex technique to the interrupt constraint model,and calculate the range of the density of the Poisson process under the condition of an interrupt constraint.The transmission capacity of a full-duplex wireless ad hoc network under the conditions of the interruption constraint.Our research improves the probability of successful transmission of full-duplex wireless networks and optimizes the capacity of full-duplex wireless networks.